After another round marred by confusion and controversy, Harrigan dumped video referee Sean Hampstead for the blunder he made in Canterbury's win over the Tigers.

He also posted a detailed video presentation on the NRL's official website to explain the obstruction rule to fans, while all clubs will be contacted this week to try to clear up the mess.

Harrigan admitted Hampstead stuffed up when he awarded a try to Canterbury winger Jonathan Wright instead of penalising the Bulldogs for obstruction.

"The video referee decision on Friday night was incorrect. It was wrong," Harrigan said.

"It should have not been given a try."

Harrigan was also forced to admit the Broncos were dudded in their one-point loss to Melbourne when the Storm's Sisa Waqa was awarded a try despite dropping the ball.

Harrigan said: "Yeah, it was wrong. He loses the ball."

Asked if the referees were in crisis given the fallout from senior players, coaches and leading commentators after the mistakes, Harrigan said: "Would they be making those comments if (the Canterbury decision) was no try.

"All I'm doing is preparing the referees as well as I can and we are going out to do the best we can. That is our job, that is what we are concentrating on, that is what I am concerned about.

"That's my comment. As far as anything else goes, I'm not going down that line."

Harrigan last night posted a video on the NRL website to try to help fans understand a complicated obstruction rule.

He said: "There are a lot of people out there who don't understand it anymore when they keep saying you can't run around your own player. You can in certain circumstances.

"What I have to try and do now is get that message out there to clubs, players, fans that there are some circumstances when you can run around behind your own player and these are those circumstances."

The obstruction rule wasn't the only decision that caused controversy on Friday night.

Wests Tigers skipper Robbie Farah was also adamant he should have been awarded a try when referee Jared Maxwell ruled he was held up.

Harrigan backed his match officials for their decision.

"That got sent up to the video referee (Hampstead)," he said. "The video referee could not find any evidence there to put that ball on the ground. Without all the evidence our policy is you have to send it back a ref's call. The referee was of the opinion he was held up, so he goes back to his original opinion, held up."

The Channel 9 vision showed Maxwell missed the moment Farah said he "1000 per cent" grounded the ball.

Harrigan said that didn't constitute benefit of the doubt.

"Because the video referee didn't have all the evidence, he can't give benefit of the doubt," he said. "He (Hampstead) stuck to his guns and he did exactly what the policy says he has to do. The second phase of that comes back to the referee and his opinion. His opinion was he was held up."No one of us can definitively say he got the ball down. So if we can't do that we can't say whether that referee is right or wrong."

Harrigan also defended the try that was awarded to the Gold Coast's Steve Michaels on Sunday that led to more questions about the obstruction rule from Nathan Hindmarsh and Scott Prince and had Parramatta coach Brad Arthur raising fears a similar call would cost a team a final.

But Harrigan said the try ruling was right.

"That is a try because by the time the ball carrier runs behind him, that decoy runner has already gone through the defensive line, so there is no player between the ball carrier from the ball carrier's side and the defence," he said.

"He has gone right out of the way. The ball carrier has committed no defence. That is the difference there."